Shelving unit



FIG. 1 is a perspective view of a shelving unit showing my new design;

FIG. 2 is a front elevation view;

FIG. 3 is a left side elevation view;

FIG. 4 is a right side elevation view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view; and,

FIG. 7 is a rear elevation view.

The ornamental design for a shelving unit, as shown and described.